

ICHTHYOLOGY. 



45 





1. ALGOMA AMARA, Grd. 

 Plate XXVII, Figs. 17—20. 



Spec. Char.— Head constituting about the fifth of the total length. Ten rows of scales upon the line of greatest depth, five 

 above the lateral line and four beneath it. The upper surface of the head and nape is flattened, as in Hydrargyra and Fumlulus. 



SYX.—rflgoma amara, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 180. 



The dorsal region is of a pale red, the sides are silvery, whilst the abdomen is whitish. 



Dl,8; A 2, 8 ; C 7, 1, 9, 8, 1, 6 ; V 8 ; P 15 or 1C. 



Plate XXVII, fig. 17, represents Algoma amara, size of life; fig. 18 is a scale from the 

 dorsal region ; fig. 19, a scale from the lateral line; and, fig. 20, a scale from the abdominal 



region. 



List of specimens. 



Catal. 



No 



Cor. No 

 of teeth. 



No. of 

 spec. 



149 



2727 



Locality. 



When 

 collected. 



Whence obtained. 



Nature of 

 specimen. 



Collected by 



1 



Laguna, near Fort Brown, Tex. 



1853 



Maj. Emory Alcoholic. Jno. H. Clark 









2. ALGOMA FLUVIATILTS, Grd 



Plate XXVII, Figs. 13—16. 



Spec. Char. — This species has the general aspect of a young* Campostoma, and might easily be taken as such. Its mouth 

 and eye are smaller than in the preceding species. The upper lobe of the caudal is longer than the lower lobe. There are 

 also ten longitudinal rows of scales upon the line of greatest depth. The upper surface of the head exhibiting numerous small 

 spiny tubercles, as fishes sometimes have during the breeding season. 



Syn. — Algoma jluviatilis, Grd. in Proc. Acad. Nat. Sc Philad. VIII, 1856, 180. 



Color reddish brown above ; yellowish brown beneath* 



D 1, 8 ; A 8 ; C 5, 1, 9, 8, 1, 4 ; Y 8 ; P 17. 



Plate XXVII, fig. 13, represents Algoma fluviatilis, size of life; fig. 14 is a scale from the 

 dorsal region ; fig. 15, a scale from the lateral line ; and, fig. 16, a scale from the abdominal 



region. 







* 



List of specimens. 



■ 





Catal. 

 No. 



Cor. No. 

 of teeth. 



No. of 

 spec. 



i 



Age. 



Locality. 



When 

 collected. 



Whence obtained. 



Nature of 

 specimen. 



Collected by — 



148 



2726 



Adult 



Near Monterey, New Leon. 



1853 



Lt. D. N. Couch.... 



Alcoholic. Lt. D. X. Couch 





COCHLOGNATUILS, B. & G. 



Gen. Char. — Under the external aspect of Pimephales, it presents that unique peculiarity in the cyprinoid family, of having 

 c poon-shaped bony expansions of the jaws. There is one on each side on the upper as well as on the lower jaw, exactly as in 



dorsal 



the genus Tetraodon ; their edge being sharp and cutting. The head is short and the snout very blunt. 



structure of thai of Pimepkules; the insertion of the vtntrals is situated under the anterior margin of the clonal, the caudal 



